中文摘要：

鉴于钢管对方形钢管混凝土柱约束作用所呈现不均匀的特点，采用体积的核心混凝土强、弱约束区划分方法，建立了适厍于普通方形钢管混凝土和带约束拉杆方形钢管混凝土中核心混凝土本构关系，用大型通用软件ANSYS对短柱试件的轴压试验进行了模拟，有限元结果与试验结果吻合良好。

英文摘要：

Given the constraint function of steel tube for square CFT shows the characteristics of uneven, the core concrete is divised by volume into the strong and weak area, set up suitable constitutive relationship for ordinary square CFT and square CFT with binding bars. The axial com- pression test was simulated to stub columns with the ANSYS software, and the finite element analysis agree well with the experimental results.